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Finding the Fourth Proportional to 760.97, 1,049.19 and 620.95

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Solution

The fourth proportional to 760.97, 1,049.19 and 620.95 is: 856.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.97 : 1,049.19 = 620.95 : x
  2. Step 2: Convert to fraction form
    760.97/1,049.19 = 620.95/x
  3. Step 3: Cross multiply
    760.97x = 1,049.19 × 620.95
  4. Step 4: Simplify right side
    760.97x = 651,489.58
  5. Step 5: Solve for x
    x = 651,489.58/760.97
  6. Step 6: Final answer
    x = 856.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.